PacMapEx

java.lang.Object
- ohos.interwork.utils.PacMapEx

所有已实现的接口:

ParcelableEx, Sequenceable
```
public class PacMapEx
extends Object
implements ParcelableEx, Sequenceable
```
Defines the structure for the data packets transmitted between processes across platforms. In an ohos process, your application data is stored as key-value pairs in a PacMapEx object. This object will be marshalled and then transmitted to a process in another platform. After receiving the marshalled object, that process will unmarshal it and then read the data.

从以下版本开始:

3

嵌套类概要
- 从接口继承的嵌套类/接口 ohos.utils.Sequenceable
  Sequenceable.Producer<T>

字段概要

字段
限定符和类型字段说明

protected HashMap<String,Object> dataMap
Indicates the Hashmap used to store key-value pairs in PacMapEx.

字段
限定符和类型	字段	说明
`protected HashMap<String,Object>`	`dataMap`	Indicates the `Hashmap` used to store key-value pairs in `PacMapEx`.

构造器概要

构造器
构造器	说明
`PacMapEx()`	Default constructor used to create a `PacMapEx` instance, in which the `HashMap` object has no key-value pair.
`PacMapEx(int capacity)`	A constructor used to create a `PacMapEx` instance with the number of key-value pairs specified by `HashMap`.
`PacMapEx(PacMapEx outMap, boolean isDeepCopy)`	Construct a PacMapEx object from another PacMapEx, which can make a deep copy if the second parameter is true.

方法概要

所有方法实例方法具体方法
限定符和类型	方法	说明
`ClassLoader`	`getCustomClassLoader()`	Obtains the `ClassLoader` used by the custom object within this `PacMap` instance.
`Optional<Object>`	`getObjectValue(String key)`	Obtains an object with a specified key.
`boolean`	`hasFileDescriptor()`	Checks whether the implementation class of this `Sequenceable` contains `FileDescriptor` object data.
`boolean`	`marshalling(Parcel out)`	Marshals this `Sequenceable` object into a `Parcel`.
`void`	`marshallingEx(Parcel out)`	Writes a `ParcelableEx` object into a `Parcel`.
`void`	`putAll(Map<String,Object> map)`	Adds all key-value pairs of a specified `Map` object into this `PacMapEx`.
`void`	`putObjectValue(String key, Object value)`	Adds a universal object with a specified key.
`void`	`setCustomClassLoader(ClassLoader loader)`	Sets the `ClassLoader` used to create an custom object within this `PacMap` instance.
`int`	`size()`	Obtains the number of key-value pairs stored in this `PacMapEx`.
`boolean`	`unmarshalling(Parcel in)`	Unmarshals this `Sequenceable` object from a `Parcel`.
`void`	`unmarshallingEx(Parcel in)`	Unmarshalls this `ParcelableEx` object from a `Parcel`.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - dataMap
```
protected final HashMap<String,Object> dataMap
```
    Indicates the Hashmap used to store key-value pairs in PacMapEx.
    
    从以下版本开始:
    
    3
- 构造器详细资料
  - PacMapEx
```
public PacMapEx(int capacity)
```
    A constructor used to create a PacMapEx instance with the number of key-value pairs specified by HashMap.
    
    参数:
    
    capacity - Indicates the number of key-value pairs specified by HashMap.
    
    从以下版本开始:
    
    3
  - PacMapEx
```
public PacMapEx()
```
    Default constructor used to create a PacMapEx instance, in which the HashMap object has no key-value pair.
    
    从以下版本开始:
    
    3
  - PacMapEx
```
public PacMapEx(PacMapEx outMap,
                boolean isDeepCopy)
```
    Construct a PacMapEx object from another PacMapEx, which can make a deep copy if the second parameter is true.
    Note: deep copy only support primitive Data types, Object, and array of them, and also an inner PacMapEx. If the PacMapEx has a map inner, the map will not be deep copied. even if the isDeepCopy is true.
    
    参数:
    
    outMap - Indicates the PacMapEx to be copied.
    
    isDeepCopy - Indicates whether to do a deep copy. if set true, will do a deep copy.
    
    从以下版本开始:
    
    3
- 方法详细资料
  - setCustomClassLoader
```
public void setCustomClassLoader(ClassLoader loader)
```
    Sets the ClassLoader used to create an custom object within this PacMap instance.
    
    参数:
    
    loader - Indicates the ClassLoader to set.
    
    从以下版本开始:
    
    3
    
    另请参阅:
    
    getCustomClassLoader()
  - getCustomClassLoader
```
public ClassLoader getCustomClassLoader()
```
    Obtains the ClassLoader used by the custom object within this PacMap instance.
    
    返回:
    
    Returns the ClassLoader used by the custom object of this PacMap instance.
    
    从以下版本开始:
    
    3
    
    另请参阅:
    
    setCustomClassLoader(ClassLoader loader)
  - size
```
public int size()
```
    Obtains the number of key-value pairs stored in this PacMapEx.
    
    返回:
    
    Returns the number of key-value pairs in this PacMapEx.
    
    从以下版本开始:
    
    3
  - putAll
```
public void putAll(Map<String,Object> map)
```
    Adds all key-value pairs of a specified Map object into this PacMapEx.
    
    参数:
    
    map - Indicates the Map object whose keys are in String format.
    
    从以下版本开始:
    
    3
  - putObjectValue
```
public void putObjectValue(String key,
                           Object value)
```
    Adds a universal object with a specified key. If an object with the same key already exists, the object will be replaced by the added object.
    
    参数:
    
    key - Indicates the key in String format, which can be null.
    
    value - Indicates the object to be added.
    
    从以下版本开始:
    
    3
  - getObjectValue
```
public Optional<Object> getObjectValue(String key)
```
    Obtains an object with a specified key.
    
    参数:
    
    key - Indicates the key in String format, which can be null.
    
    返回:
    
    Returns the object with the specified key, which is encapsulated in Optional; returns null if no such object is found.
    
    从以下版本开始:
    
    3
  - marshallingEx
```
public void marshallingEx(Parcel out)
```
    从接口复制的说明: ParcelableEx
    
    Writes a ParcelableEx object into a Parcel.
    
    指定者:
    
    marshallingEx 在接口中 ParcelableEx
    
    参数:
    
    out - Indicates the Parcel object to which the ParcelableEx object will be written.
  - unmarshallingEx
```
public void unmarshallingEx(Parcel in)
```
    从接口复制的说明: ParcelableEx
    
    Unmarshalls this ParcelableEx object from a Parcel.
    To achieve successful data unmarshalling, you must provide a no-argument constructor for the class that inherits the ParcelableEx interface and write the class name to Parcel in the ParcelableEx.marshallingEx(ohos.utils.Parcel) method.
    
    指定者:
    
    unmarshallingEx 在接口中 ParcelableEx
    
    参数:
    
    in - Indicates the Parcel object from which the ParcelableEx object will be unmarshaled.
  - marshalling
```
public boolean marshalling(Parcel out)
```
    从接口复制的说明: Sequenceable
    
    Marshals this Sequenceable object into a Parcel.
    
    指定者:
    
    marshalling 在接口中 Sequenceable
    
    参数:
    
    out - Indicates the Parcel object to which the Sequenceable object will be marshaled..
    
    返回:
    
    Returns true if the marshalling is successful; returns false otherwise.
  - unmarshalling
```
public boolean unmarshalling(Parcel in)
```
    从接口复制的说明: Sequenceable
    
    Unmarshals this Sequenceable object from a Parcel.
    
    指定者:
    
    unmarshalling 在接口中 Sequenceable
    
    参数:
    
    in - Indicates the Parcel object into which the Sequenceable object has been marshaled.
    
    返回:
    
    Returns true if the unmarshalling is successful; returns false otherwise.
  - hasFileDescriptor
```
public boolean hasFileDescriptor()
```
    从接口复制的说明: Sequenceable
    
    Checks whether the implementation class of this Sequenceable contains FileDescriptor object data.
    If the custom Sequenceable class contains any FileDescriptor data, you should override this method. This method return false by default.
    
    指定者:
    
    hasFileDescriptor 在接口中 Sequenceable
    
    返回:
    
    Returns true if it contains FileDescriptor data; returns false otherwise.

类 PacMapEx

嵌套类概要

从接口继承的嵌套类/接口 ohos.utils.Sequenceable

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

dataMap

构造器详细资料

PacMapEx

PacMapEx

PacMapEx

方法详细资料

setCustomClassLoader

getCustomClassLoader

size

putAll

putObjectValue

getObjectValue

marshallingEx

unmarshallingEx

marshalling

unmarshalling

hasFileDescriptor